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The Plant Guide

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Siberian iris

Iris sibirica

EYE-riss sih-BEER-ih-kah

Attractive, grass-like leaves to 18 inches long are topped by showy flowers in a wide range of colors. Flowers unfurl in May and bloom well into June. Cultivars include ‘Caesar’s Brother’, with rich purple flowers; ‘Eric the Red’, a bright violet-pink Siberian; and ‘Chilled Wine’, a garnet iris suffused with blue.

CareThrives in acidic, heavy, clay soils, and loves wet feet. Low maintenance, requiring only feeding and division every few years. Ideal for ponds, streams, or boggy areas. In beds, they require a few extra waterings in a season.

PropagationLift and divide clumps, or separate bulb offsets, and plant immediately, in early autumn.

ProblemsIris borer, verbena bud moth, whiteflies, iris weevil, thrips, slugs and snails, aphids, and nematodes. Bacterial leaf blight and soft rot, crown rot, rhizome rot, leaf spot, rust, viruses, and scorch.

  • Genus : Iris
  • Plant Height : 1 to 3 feet
  • Zones : 3, 4, 5, 6, 7, 8, 9
  • Bloom Time : Early Summer, Late Spring, Spring, Summer
  • Light : Full Sun to Partial Shade
  • Moisture : Medium to Wet
  • Maintenance : Moderate
  • Plant Type : Perennials
  • Flower Color : Pink
  • Growth Rate : Slow
  • Plant Seasonal Interest : Summer Interest
View Comments


  1. user-7006956 05/15/2014

    What is the proper thing to do when the "green" starts laying down and sprawling over other plants?

    1. user-7006958 06/03/2014

      Cut down to 1 foot high

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